2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * SGI UV Broadcast Assist Unit definitions
8 * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
11 #ifndef _ASM_X86_UV_UV_BAU_H
12 #define _ASM_X86_UV_UV_BAU_H
14 #include <linux/bitmap.h>
18 * Broadcast Assist Unit messaging structures
20 * Selective Broadcast activations are induced by software action
21 * specifying a particular 8-descriptor "set" via a 6-bit index written
23 * Thus there are 64 unique 512-byte sets of SB descriptors - one set for
24 * each 6-bit index value. These descriptor sets are mapped in sequence
25 * starting with set 0 located at the address specified in the
26 * BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
27 * set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
29 * We will use 31 sets, one for sending BAU messages from each of the 32
32 * TLB shootdown will use the first of the 8 descriptors of each set.
33 * Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
36 #define UV_ITEMS_PER_DESCRIPTOR 8
37 #define MAX_BAU_CONCURRENT 3
38 #define UV_CPUS_PER_ACT_STATUS 32
39 #define UV_ACT_STATUS_MASK 0x3
40 #define UV_ACT_STATUS_SIZE 2
41 #define UV_ADP_SIZE 32
42 #define UV_DISTRIBUTION_SIZE 256
43 #define UV_SW_ACK_NPENDING 8
44 #define UV_NET_ENDPOINT_INTD 0x38
45 #define UV_DESC_BASE_PNODE_SHIFT 49
46 #define UV_PAYLOADQ_PNODE_SHIFT 49
47 #define UV_PTC_BASENAME "sgi_uv/ptc_statistics"
48 #define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask))
49 #define UV_ENABLE_INTD_SOFT_ACK_MODE_SHIFT 15
50 #define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHIFT 16
51 #define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD 0x000000000bUL
52 /* [19:16] SOFT_ACK timeout period 19: 1 is urgency 7 17:16 1 is multiplier */
53 #define BAU_MISC_CONTROL_MULT_MASK 3
55 #define UVH_AGING_PRESCALE_SEL 0x000000b000UL
56 /* [30:28] URGENCY_7 an index into a table of times */
57 #define BAU_URGENCY_7_SHIFT 28
58 #define BAU_URGENCY_7_MASK 7
60 #define UVH_TRANSACTION_TIMEOUT 0x000000b200UL
61 /* [45:40] BAU - BAU transaction timeout select - a multiplier */
62 #define BAU_TRANS_SHIFT 40
63 #define BAU_TRANS_MASK 0x3f
66 * bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
68 #define DESC_STATUS_IDLE 0
69 #define DESC_STATUS_ACTIVE 1
70 #define DESC_STATUS_DESTINATION_TIMEOUT 2
71 #define DESC_STATUS_SOURCE_TIMEOUT 3
74 * source side threshholds at which message retries print a warning
76 #define SOURCE_TIMEOUT_LIMIT 20
77 #define DESTINATION_TIMEOUT_LIMIT 20
80 * misc. delays, in microseconds
82 #define THROTTLE_DELAY 10
83 #define TIMEOUT_DELAY 10
85 /* BIOS is assumed to set the destination timeout to 1003520 nanoseconds */
88 * threshholds at which to use IPI to free resources
90 #define PLUGSB4RESET 100
91 #define TIMEOUTSB4RESET 100
94 * number of entries in the destination side payload queue
96 #define DEST_Q_SIZE 20
98 * number of destination side software ack resources
100 #define DEST_NUM_RESOURCES 8
101 #define MAX_CPUS_PER_NODE 32
103 * completion statuses for sending a TLB flush message
105 #define FLUSH_RETRY_PLUGGED 1
106 #define FLUSH_RETRY_TIMEOUT 2
107 #define FLUSH_GIVEUP 3
108 #define FLUSH_COMPLETE 4
111 * Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor)
112 * If the 'multilevel' flag in the header portion of the descriptor
113 * has been set to 0, then endpoint multi-unicast mode is selected.
114 * The distribution specification (32 bytes) is interpreted as a 256-bit
115 * distribution vector. Adjacent bits correspond to consecutive even numbered
116 * nodeIDs. The result of adding the index of a given bit to the 15-bit
117 * 'base_dest_nodeid' field of the header corresponds to the
118 * destination nodeID associated with that specified bit.
120 struct bau_target_uvhubmask {
121 unsigned long bits[BITS_TO_LONGS(UV_DISTRIBUTION_SIZE)];
125 * mask of cpu's on a uvhub
126 * (during initialization we need to check that unsigned long has
127 * enough bits for max. cpu's per uvhub)
129 struct bau_local_cpumask {
134 * Payload: 16 bytes (128 bits) (bytes 0x20-0x2f of descriptor)
135 * only 12 bytes (96 bits) of the payload area are usable.
136 * An additional 3 bytes (bits 27:4) of the header address are carried
137 * to the next bytes of the destination payload queue.
138 * And an additional 2 bytes of the header Suppl_A field are also
139 * carried to the destination payload queue.
140 * But the first byte of the Suppl_A becomes bits 127:120 (the 16th byte)
141 * of the destination payload queue, which is written by the hardware
142 * with the s/w ack resource bit vector.
143 * [ effective message contents (16 bytes (128 bits) maximum), not counting
144 * the s/w ack bit vector ]
148 * The payload is software-defined for INTD transactions
150 struct bau_msg_payload {
151 unsigned long address; /* signifies a page or all TLB's
154 unsigned short sending_cpu; /* filled in by sender */
156 unsigned short acknowledge_count;/* filled in by destination */
158 unsigned int reserved1:32; /* not usable */
163 * Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
164 * see table 4.2.3.0.1 in broacast_assist spec.
166 struct bau_msg_header {
167 unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
169 unsigned int base_dest_nodeid:15; /* nasid (pnode<<1) of */
170 /* bits 20:6 */ /* first bit in uvhub map */
171 unsigned int command:8; /* message type */
173 /* 0x38: SN3net EndPoint Message */
174 unsigned int rsvd_1:3; /* must be zero */
176 /* int will align on 32 bits */
177 unsigned int rsvd_2:9; /* must be zero */
179 /* Suppl_A is 56-41 */
180 unsigned int sequence:16;/* message sequence number */
181 /* bits 56:41 */ /* becomes bytes 16-17 of msg */
182 /* Address field (96:57) is never used as an
183 address (these are address bits 42:3) */
185 unsigned int rsvd_3:1; /* must be zero */
187 /* address bits 27:4 are payload */
188 /* these next 24 (58-81) bits become bytes 12-14 of msg */
190 /* bits 65:58 land in byte 12 */
191 unsigned int replied_to:1;/* sent as 0 by the source to byte 12 */
193 unsigned int msg_type:3; /* software type of the message*/
195 unsigned int canceled:1; /* message canceled, resource to be freed*/
197 unsigned int payload_1a:1;/* not currently used */
199 unsigned int payload_1b:2;/* not currently used */
202 /* bits 73:66 land in byte 13 */
203 unsigned int payload_1ca:6;/* not currently used */
205 unsigned int payload_1c:2;/* not currently used */
208 /* bits 81:74 land in byte 14 */
209 unsigned int payload_1d:6;/* not currently used */
211 unsigned int payload_1e:2;/* not currently used */
214 unsigned int rsvd_4:7; /* must be zero */
216 unsigned int sw_ack_flag:1;/* software acknowledge flag */
218 /* INTD trasactions at destination are to
219 wait for software acknowledge */
220 unsigned int rsvd_5:6; /* must be zero */
222 unsigned int rsvd_6:5; /* must be zero */
224 unsigned int int_both:1;/* if 1, interrupt both sockets on the uvhub */
226 unsigned int fairness:3;/* usually zero */
228 unsigned int multilevel:1; /* multi-level multicast format */
230 /* 0 for TLB: endpoint multi-unicast messages */
231 unsigned int chaining:1;/* next descriptor is part of this activation*/
233 unsigned int rsvd_7:21; /* must be zero */
239 #define MSG_REGULAR 1
243 * The activation descriptor:
244 * The format of the message to send, plus all accompanying control
248 struct bau_target_uvhubmask distribution;
250 * message template, consisting of header and payload:
252 struct bau_msg_header header;
253 struct bau_msg_payload payload;
256 * -payload-- ---------header------
257 * bytes 0-11 bits 41-56 bits 58-81
260 * A/B/C are moved to:
262 * bytes 0-11 bytes 12-14 bytes 16-17 (byte 15 filled in by hw as vector)
263 * ------------payload queue-----------
267 * The payload queue on the destination side is an array of these.
268 * With BAU_MISC_CONTROL set for software acknowledge mode, the messages
269 * are 32 bytes (2 micropackets) (256 bits) in length, but contain only 17
270 * bytes of usable data, including the sw ack vector in byte 15 (bits 127:120)
271 * (12 bytes come from bau_msg_payload, 3 from payload_1, 2 from
272 * sw_ack_vector and payload_2)
273 * "Enabling Software Acknowledgment mode (see Section 4.3.3 Software
274 * Acknowledge Processing) also selects 32 byte (17 bytes usable) payload
277 struct bau_payload_queue_entry {
278 unsigned long address; /* signifies a page or all TLB's
280 /* 64 bits, bytes 0-7 */
282 unsigned short sending_cpu; /* cpu that sent the message */
283 /* 16 bits, bytes 8-9 */
285 unsigned short acknowledge_count; /* filled in by destination */
286 /* 16 bits, bytes 10-11 */
288 /* these next 3 bytes come from bits 58-81 of the message header */
289 unsigned short replied_to:1; /* sent as 0 by the source */
290 unsigned short msg_type:3; /* software message type */
291 unsigned short canceled:1; /* sent as 0 by the source */
292 unsigned short unused1:3; /* not currently using */
295 unsigned char unused2a; /* not currently using */
297 unsigned char unused2; /* not currently using */
300 unsigned char sw_ack_vector; /* filled in by the hardware */
301 /* byte 15 (bits 127:120) */
303 unsigned short sequence; /* message sequence number */
305 unsigned char unused4[2]; /* not currently using bytes 18-19 */
308 int number_of_cpus; /* filled in at destination */
309 /* 32 bits, bytes 20-23 (aligned) */
311 unsigned char unused5[8]; /* not using */
316 * one per-cpu; to locate the software tables
319 struct bau_desc *descriptor_base;
320 struct bau_payload_queue_entry *va_queue_first;
321 struct bau_payload_queue_entry *va_queue_last;
322 struct bau_payload_queue_entry *bau_msg_head;
323 struct bau_control *uvhub_master;
324 struct bau_control *socket_master;
325 unsigned long timeout_interval;
326 atomic_t active_descriptor_count;
328 int max_concurrent_constant;
329 int retry_message_scans;
337 short cpus_in_socket;
339 unsigned short message_number;
340 unsigned short uvhub_quiesce;
341 short socket_acknowledge_count[DEST_Q_SIZE];
342 cycles_t send_message;
343 spinlock_t masks_lock;
344 spinlock_t uvhub_lock;
345 spinlock_t queue_lock;
349 * This structure is allocated per_cpu for UV TLB shootdown statistics.
352 /* sender statistics */
353 unsigned long s_giveup; /* number of fall backs to IPI-style flushes */
354 unsigned long s_requestor; /* number of shootdown requests */
355 unsigned long s_stimeout; /* source side timeouts */
356 unsigned long s_dtimeout; /* destination side timeouts */
357 unsigned long s_time; /* time spent in sending side */
358 unsigned long s_retriesok; /* successful retries */
359 unsigned long s_ntargcpu; /* number of cpus targeted */
360 unsigned long s_ntarguvhub; /* number of uvhubs targeted */
361 unsigned long s_ntarguvhub16; /* number of times >= 16 target hubs */
362 unsigned long s_ntarguvhub8; /* number of times >= 8 target hubs */
363 unsigned long s_ntarguvhub4; /* number of times >= 4 target hubs */
364 unsigned long s_ntarguvhub2; /* number of times >= 2 target hubs */
365 unsigned long s_ntarguvhub1; /* number of times == 1 target hub */
366 unsigned long s_resets_plug; /* ipi-style resets from plug state */
367 unsigned long s_resets_timeout; /* ipi-style resets from timeouts */
368 unsigned long s_busy; /* status stayed busy past s/w timer */
369 unsigned long s_throttles; /* waits in throttle */
370 unsigned long s_retry_messages; /* retry broadcasts */
371 /* destination statistics */
372 unsigned long d_alltlb; /* times all tlb's on this cpu were flushed */
373 unsigned long d_onetlb; /* times just one tlb on this cpu was flushed */
374 unsigned long d_multmsg; /* interrupts with multiple messages */
375 unsigned long d_nomsg; /* interrupts with no message */
376 unsigned long d_time; /* time spent on destination side */
377 unsigned long d_requestee; /* number of messages processed */
378 unsigned long d_retries; /* number of retry messages processed */
379 unsigned long d_canceled; /* number of messages canceled by retries */
380 unsigned long d_nocanceled; /* retries that found nothing to cancel */
381 unsigned long d_resets; /* number of ipi-style requests processed */
382 unsigned long d_rcanceled; /* number of messages canceled by resets */
385 static inline int bau_uvhub_isset(int uvhub, struct bau_target_uvhubmask *dstp)
387 return constant_test_bit(uvhub, &dstp->bits[0]);
389 static inline void bau_uvhub_set(int uvhub, struct bau_target_uvhubmask *dstp)
391 __set_bit(uvhub, &dstp->bits[0]);
393 static inline void bau_uvhubs_clear(struct bau_target_uvhubmask *dstp,
396 bitmap_zero(&dstp->bits[0], nbits);
398 static inline int bau_uvhub_weight(struct bau_target_uvhubmask *dstp)
400 return bitmap_weight((unsigned long *)&dstp->bits[0],
401 UV_DISTRIBUTION_SIZE);
404 static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
406 bitmap_zero(&dstp->bits, nbits);
409 #define cpubit_isset(cpu, bau_local_cpumask) \
410 test_bit((cpu), (bau_local_cpumask).bits)
412 extern void uv_bau_message_intr1(void);
413 extern void uv_bau_timeout_intr1(void);
415 struct atomic_short {
420 * atomic_read_short - read a short atomic variable
421 * @v: pointer of type atomic_short
423 * Atomically reads the value of @v.
425 static inline int atomic_read_short(const struct atomic_short *v)
431 * atomic_add_short_return - add and return a short int
432 * @i: short value to add
433 * @v: pointer of type atomic_short
435 * Atomically adds @i to @v and returns @i + @v
437 static inline int atomic_add_short_return(short i, struct atomic_short *v)
440 asm volatile(LOCK_PREFIX "xaddw %0, %1"
441 : "+r" (i), "+m" (v->counter)
446 #endif /* _ASM_X86_UV_UV_BAU_H */